JP3549505B2 - Data recording device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a data recording device, and more particularly, to a data recording device that records data indicating an operation state of a device.
[0002]
[Prior art]
As a data recording device, for example, a technique described in Japanese Patent Application Laid-Open No. 6-18293 is known. In this data recording device, the measurement data temporarily stored in the ring buffer is normally transferred to a predetermined recording area (recording means) while being thinned out at predetermined intervals, and recorded. When the value is out of the range, a trigger is generated, and before and after the trigger is generated, the stored data is transferred to a predetermined recording area without thinning and recorded.
[0003]
[Problems to be solved by the invention]
When data recorded by such a data recording device is used for analyzing the cause of an abnormality of a device or the like, it is conceivable to set the occurrence of an abnormality in a target device as the trigger generation condition.
[0004]
It is desirable that data relating to device abnormalities and failures can be recorded for each type in a predetermined recording area. However, equipment failures include transient ones (such as those that are temporarily confirmed due to noise, etc., or those that occur temporarily in certain operating conditions, such as during extreme high-load operation). And those that are likely to self-recover over time. In other words, those that have a high probability (reproducibility) of repeated occurrence of abnormalities and normals. (Which is continuous and, once it occurs, has a low probability of self-recovery and poor reproducibility; hereinafter, referred to as "failure"). This transient abnormality is generally repeated multiple times. If the occurrence of an abnormality is set as a trigger generation condition as described above, data on the same abnormality is recorded a plurality of times. For this reason, there is a problem that the capacity of the recording area is wasted, and important data relating to other abnormalities or failures cannot be recorded.
[0005]
In order to solve this problem, it is also conceivable to accurately determine whether the abnormality of the device is a transient abnormality or a failure, and to record data when the failure is determined as the trigger as described above. With this configuration, it becomes impossible to record data relating to transient abnormalities.
[0006]
In general, in the analysis of the cause of a device abnormality or failure, data obtained a predetermined time before the occurrence of an abnormality (including data that is later determined to be a failure), and Data including information on a transition period from a state to an abnormality (failure) occurrence is important. However, since it usually takes a certain amount of time to determine an abnormality of a device as a failure, data of a predetermined time before the occurrence of the abnormality (failure) cannot be obtained after determining the abnormality of the device as a failure. There was such a problem.
[0007]
If the data is continuously recorded for a period from a predetermined time before the occurrence of the abnormality (failure) to a time when the abnormality is determined to be a failure, the above-described problem can be solved. However, in this case, the abnormality or the failure that is not particularly important in the cause analysis is performed. The data after the occurrence of the error, that is, the data until the abnormality is determined to be a failure, is recorded, and the problem of wasting the capacity of the recording area cannot be solved.
[0008]
In addition, since the data of the transition period is important, the reproducibility is low (that is, similar to that of the transient abnormality having high reproducibility (that is, high possibility that the same transition period is repeatedly generated)). (Transient periods will not occur in the future.) It is desirable to preferentially record data on failures.
[0009]
SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a data recording apparatus which solves the above-mentioned problem and can efficiently record important data relating to various abnormalities and failures in a predetermined recording area. It is still another object of the present invention to provide a data recording apparatus capable of efficiently recording data relating to a transition period of a failure.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides, in claim 1, Mounted on the vehicle A data recording device that records data indicating an operation state of a device, an abnormality detection unit that detects an abnormality of the data, an abnormality type determination unit that determines a type of the abnormality when the abnormality of the data is detected, Recording content determining means for determining whether or not the data is recorded in a predetermined data recording area together with the determined abnormality type, and the data is stored in a predetermined data recording area together with the determined abnormality type. When it is determined that the data is not recorded, the data recording device includes a data recording unit that records the data in the predetermined data recording area together with the type of the determined abnormality. Continuous over the failure confirmation time A failure determination unit that, when detected, determines the abnormality as a failure of the device; and When the ignition switch of the vehicle is turned on It is determined whether or not the abnormality is determined to be the failure, and when the abnormality is not determined to be the failure, the data recorded when the abnormality that is not determined to be the failure is detected is deleted. Data erasing means.
[0011]
Mounted on the vehicle An abnormality of data indicating the operation state of the device is detected, and when the abnormality of the data is detected, the type of the abnormality is determined, and the data, specifically, the content of the abnormality is determined by the type of the determined abnormality. It is determined whether or not the data is already recorded in a predetermined data recording area, and when it is determined that the data is not yet recorded in the predetermined data recording area together with the type of the determined abnormality, the data is Since it is configured to be recorded in the predetermined data recording area together with the type of the determined abnormality, it is possible to prevent similar data related to an event that may occur repeatedly such as a transient abnormality from being recorded a plurality of times. Can be prevented. Therefore, important data relating to various abnormalities and failures can be efficiently recorded in a predetermined recording area. In other words, the capacity of the recording area can be reduced, and the effect of suppressing costs can be expected.
[0013]
Also, When data abnormality is detected continuously for the failure confirmation time, Determining the abnormality as a failure of the device; When the ignition switch of the vehicle is turned on It is determined whether or not the abnormality is determined to be the failure, and when the abnormality is not determined to be the failure, the data recorded when the abnormality that is not determined to be the failure is detected is deleted. With such a configuration, important data relating to various failures can be efficiently recorded in a predetermined recording area. In other words, the capacity of the recording area can be reduced, and the effect of suppressing costs can be expected.
[0014]
Further, at a predetermined time, it is determined whether or not the abnormality is determined to be a failure, and when the failure is not determined, the data corresponding to the abnormality is deleted. In other words, the data is deleted before the predetermined time. In other words, since the recorded data is left irrespective of whether the abnormality is determined to be a failure or not, the cause analysis can be performed even for an abnormality that has not been determined to be a failure.
[0015]
Claims 2 In the item, further comprises a time-series data storage means for sampling the data at a predetermined cycle and storing the data as time-series data, and the data recording means, Note ー Of The time-series data from a point in time when the abnormality is detected to a point before a predetermined time is recorded.
[0016]
The data is sampled at a predetermined cycle and stored as time-series data. Note ー Of Since the time-series data is recorded until a predetermined time before the abnormality is detected, data important for analyzing the cause of the abnormality or the failure, particularly data in a transition period, can be efficiently recorded.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a data recording device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
[0018]
FIG. 1 is a schematic diagram showing the configuration of the device.
[0019]
To be described below, the data recording device 1 records data indicating the operating state of the device and is used for analyzing abnormalities and failures of the device. Specifically, the data recording device 1 includes an ECU (electronic control unit) 2. The ECU 2 includes a microcomputer including a CPU 3, a ROM 4, a RAM 5, an input circuit 6, and an A / D converter 7.
[0020]
The ECU 2 is mounted at an appropriate position on a vehicle (not shown), controls the operation of a control target device such as an internal combustion engine or an automatic transmission, and records data relating thereto. Hereinafter, a case will be described as an example where the ECU 2 is configured as a control device of an automatic transmission and is used for analyzing an abnormality or a failure of a device, that is, an automatic transmission or a sensor.
[0021]
Here, the control device for the automatic transmission described above will be described with reference to FIG.
[0022]
In the figure, reference symbol T indicates an automatic transmission (hereinafter referred to as "transmission"). The transmission T is mounted on a vehicle (not shown) and comprises a parallel-shaft stepped automatic transmission with five forward speeds and one reverse speed.
[0023]
The transmission T includes a main shaft (input shaft) MS connected to a crankshaft 10 of an internal combustion engine (hereinafter referred to as “engine”) E via a torque converter 12 having a lock-up mechanism L, and a plurality of main shafts MS connected to the main shaft MS. A counter shaft (output shaft) CS connected through a gear train.
[0024]
The main shaft MS supports main gears 14, 16, 18, 20, 22, and 24 corresponding to the first to fifth speeds and the reverse speed, respectively. The counter shaft CS is connected to the counter gears 28, 30, 32, 34, 36 meshing with the first to fifth speed main gears, and the reverse main gear 24 via a reverse idle gear 40. Counter gear 42 is supported.
[0025]
In the above, an arbitrary shift speed is established by appropriately coupling each main gear and each counter gear to the main shaft MS and the counter shaft CS by the hydraulic clutches C1, C2, C3, C4R, and C5 for each shift speed. .
[0026]
Further, the rotation of the counter shaft CS is transmitted to a differential D via a final drive gear 46 and a final driven gear 48, and then transmitted via left and right drive shafts 50, 50 to a vehicle (shown in the figure) on which an engine E and a transmission T are mounted. ) Is transmitted to the drive wheels W, W.
[0027]
A shift lever 54 is provided near the floor of the vehicle driver's seat (not shown), and one of eight ranges, P, R, N, D5, D4, D3, 2, 1 is selected by the driver's operation. Is done. The shift lever 54 is provided with an overdrive switch (not shown) and a traveling mode changeover switch for switching between normal traveling and high output traveling where high output is expected.
[0028]
A throttle opening sensor 56 is provided near a throttle valve (not shown) disposed in an intake passage (not shown) of the engine E, and outputs a signal indicating the throttle opening TH. A vehicle speed sensor 58 is provided near the final driven gear 48 and outputs a signal indicating the vehicle speed V.
[0029]
Further, a crank angle sensor 60 is provided near a camshaft (not shown), and outputs a signal indicating the engine speed NE. Further, an absolute pressure sensor 62 is provided downstream of the position of the throttle valve in the intake path of the engine E, and outputs a signal indicating the absolute pressure (engine load) PBA in the intake pipe.
[0030]
Further, a first rotation speed sensor 64 is provided near the main shaft MS, outputs a signal indicating the input shaft rotation speed NM corresponding to the rotation of the main shaft MS, and outputs a signal near the counter shaft CS. Is provided, and outputs a signal indicating an output shaft rotation speed NC corresponding to the rotation of the counter shaft CS.
[0031]
Further, a shift lever position sensor 68 is provided in the vicinity of the shift lever 54 mounted near the vehicle driver's seat, and outputs a signal indicating a position selected by the driver among the above eight positions (ranges). Is done. Further, an overdrive switch and a traveling mode changeover switch (both not shown) are provided near the shift lever 54, and output an ON / OFF signal.
[0032]
Further, a temperature sensor 70 is provided at the transmission T or at an appropriate position in the vicinity of the transmission T, and outputs a signal proportional to the oil temperature (Automatic Transmission Fluid temperature; hydraulic oil temperature) TATF, and is disposed on the vehicle driver's seat floor. A brake switch 72 is provided near the brake pedal (not shown), and outputs an ON signal when the driver depresses the brake pedal. Further, a water temperature sensor 74 that outputs a signal proportional to the cooling water temperature TW is provided near the engine E.
[0033]
Outputs of the sensors 56 and the like are sent to the ECU 2 described above. The CPU 3 of the ECU 2 selects a plurality of maps in which shift schedules for uphill, downhill, etc. are described in accordance with various input signals, and retrieves the selected maps from the vehicle speed V and the throttle opening TH. The gear ratio is determined, and the shift solenoids (electromagnetic solenoids) SL1 to SL5 disposed in the hydraulic control circuit O are excited / de-energized via the output circuit 90 and a voltage supply circuit (not shown) to switch each hydraulic clutch. Perform control. In addition, the linear solenoids SL6 to SL8 are energized and de-energized to control the operation of the lock-up mechanism L of the torque converter 12 and the hydraulic pressure of each clutch. Note that the details of these controls do not have a direct relationship with the gist of the present invention, and thus the description thereof will be omitted.
[0034]
Returning to the description of FIG. 1, the input circuit 6 is connected to a sensor group such as the sensor 56 described above. The output of the sensor 56 and the like input to the input circuit 6 is input to the CPU 3 via the A / D converter 7.
[0035]
In addition, the CPU 3 samples various input signals and internally calculated values, for example, a gear ratio, in a predetermined cycle in accordance with a control program stored in the ROM 4 in advance, and also samples the various input signals and calculated values (hereinafter, these are referred to as (Collectively referred to as “data”) is written (updated) and stored in the RAM 5 as time-series data indicating the operating state of the transmission T at any time at predetermined (or variable) intervals. The details of the operation of storing data in the RAM 5 do not have a direct relationship with the gist of the present invention, and a description thereof will be omitted.
[0036]
Further, when an abnormality of the data is detected, the CPU 3 prohibits the updating of the data to the RAM 5 at any time as described above except for a specific condition. Thereby, the time-series data before the time when the data abnormality is detected is recorded in the RAM 5.
[0037]
Next, the operation of the data recording device 1 of recording data in the RAM 5 and determining the failure of a detected abnormality will be described with reference to the flowchart of FIG. The illustrated program is executed, for example, every 10 msec.
[0038]
In the following, it is determined in S10 whether the failure has been confirmed. Here, “failure determined” means a state in which a detected abnormality is determined to be failure based on predetermined conditions in a step described later. If the result is affirmative in S10 and it is determined that the failure has been confirmed, the subsequent processing is skipped. If the result is negative, the process proceeds to S12, and it is determined whether or not the above-described data abnormality is detected.
[0039]
Specifically, a threshold value indicating an abnormality as shown in the time chart of FIG. 4 is set in advance for the sensor output of each data, and the threshold value is compared with the current value of the sampled sensor output. Judge by such as. The shift lever position sensor 68 determines whether two or more signals indicating the shift lever position are output simultaneously. Abnormality of values internally calculated by the CPU 3, such as a gear ratio and a solenoid output, is determined by comparing a control value with a detected value.
[0040]
If the result in S12 is negative and it is determined that no data abnormality has been detected, the process proceeds to S14, where it is determined that the data is normal and the process ends. On the other hand, when the result is affirmative and it is determined that the data abnormality is detected, the process proceeds to S16, and it is determined whether the abnormality detection is started. Specifically, it is determined whether or not an abnormality is detected for the first time this time, that is, whether or not it is the abnormality detection time t1 shown in FIG.
[0041]
If the determination in S16 is affirmative and it is determined that abnormality detection has started, then the process proceeds to S18, where data recording is performed.
[0042]
FIG. 5 is a subroutine flowchart showing a specific process of recording the data. Referring to the figure, first, in S100, the type of abnormality detected in S12 of the flowchart of FIG. 3 is determined. For example, it is determined whether the position signal from the shift lever position sensor 68 is abnormal or the signal indicating the water temperature TW from the water temperature sensor 74 is abnormal, and the specific state of the abnormality (for example, the output of the water temperature sensor 74). Is determined to be too high (or too low).
[0043]
Next, the process proceeds to S102, and it is determined whether or not data relating to the same type of abnormality as the type of abnormality determined in S100 has already been recorded in the RAM 5. If the result is negative and it is determined that similar data relating to the abnormality has not yet been recorded, the process proceeds to S104, and updating of data to the RAM 5 is prohibited. Specifically, as described above, the updating of the data in the RAM 5 is prohibited, and thus the time when the abnormality is detected, that is, until a predetermined time before the abnormality detection time t1 shown in FIG. 4 (data recording time T1, for example, 6) Second).
[0044]
Here, the RAM 5 is roughly divided into two areas A and B as shown in FIG. 6, and the area A is further subdivided into three areas A1, A2 and A3, and data is stored in these three areas. It is stored in any one of the free areas A1, A2 and A3 while being updated as needed. Therefore, in S104 of the flow chart of FIG. 5, by prohibiting the update of the data, the data is recorded in any one of A1, A2, and A3.
[0045]
Further, the RAM 5 is configured by a buffer memory that is backed up, and retains recorded data even after the engine E is stopped. When data is recorded in all three areas A1, A2 and A3, the sampling of the data itself is stopped by a program (not shown).
[0046]
The data recorded with reference to FIG. 7 will be described in detail. As shown in the figure, the data is roughly divided into a group I and a group II, and is provided for each data in each area of A1, A2, and A3. Recorded in the address.
[0047]
In the above, the group I is a data group in which the amount of fluctuation is not so large in a short time series, and only one sample is recorded at the abnormality detection time t1. Specific data includes the type of abnormality determined in S100 (specifically, a failure code coded based on a specific standard), a selection map at abnormality detection time t1, a traveling distance, and a water temperature TW. Is applicable. In S102, the determination is made by comparing the type of abnormality recorded here with the type of abnormality determined in S100.
[0048]
The group II is a data group composed of data having a relatively large fluctuation amount in a short time series and data important for controlling the transmission T, and is a group of data from the abnormality detection time t1 to a predetermined time before (data recording). It is recorded as time-series data at time T1). Specifically, 15 samples stored while being thinned out at predetermined (or variable) intervals are recorded.
[0049]
As specific data, in addition to the output signals of the above-described sensor group, data intervals (the above-mentioned predetermined or variable thinning intervals [msec]), power supply voltages and output signals of the solenoids SL1 to SL8, The calculated gear ratio, the slip ratio of the torque converter 12 (calculated from the engine speed NE and the input shaft speed NM), and the like correspond. Further, as the position signals 1 and 2, specifically, the position signal 1 indicates a position signal from the shift lever position sensor 68, and the position signal 2 indicates an output signal of an overdrive switch or a running mode switch.
[0050]
Returning to the description of the flow chart of FIG. 5, when the result in S102 is affirmative and it is determined that data relating to the same type of abnormality has already been recorded in the RAM 5, the subsequent processing is skipped and data recording is executed. Exit without The above-mentioned specific condition means this.
[0051]
As described above, in the present embodiment, the type of the detected abnormality is determined, and if the data relating to the same abnormality as the determined abnormality type is already recorded in the RAM 5, the recording is not executed. Therefore, it is possible to prevent similar data regarding an event that may occur repeatedly, such as a temporary abnormality, from being recorded a plurality of times. For this reason, important data relating to various abnormalities and failures can be efficiently recorded in the predetermined recording area (RAM 5). In other words, the capacity of the RAM 5 can be reduced, and the effect of cost reduction can be expected.
[0052]
Returning to the description of the flow chart of FIG. 3, when the result in S16 is negative, the process proceeds to S20, in which it is determined whether or not the failure confirmation time T2 (for example, 1 second; shown in FIG. 4) has elapsed. More specifically, this determination is made based on whether a timer (down counter) set to one second is started when it is determined in S16 that abnormality detection has started, and whether the timer value has reached zero. This is the above-mentioned predetermined condition.
[0053]
If the result is negative and it is determined that the failure confirmation time T2 has not elapsed, the process proceeds to S22, where it is determined that a failure is being detected, and the process ends. On the other hand, when the result is affirmative and it is determined that the failure determination time T2 has elapsed, the process proceeds to S24, in which the detected abnormality is determined as a failure, and the process proceeds to S26, in which the failure determination information indicating that the failure has been determined is described. It is recorded in area B of RAM5.
[0054]
As described above, in this embodiment, “failure” means a detected abnormality that has continued over the failure determination time T2. In other words, this means an abnormality in which the possibility of self-recovery is low even over time and the reproducibility is low. In other words, it will be difficult to obtain data in a transition period important for analysis even if measurement is continued in the future.
[0055]
Next, another operation of the data recording device 1, that is, erasure of data recorded in the area A of the RAM 5, will be described with reference to a flowchart of FIG. The illustrated program is executed once when an ignition switch (not shown) provided in the vehicle is turned on.
[0056]
More specifically, in S200, it is determined whether or not data is recorded in any of the areas A1, A2, and A3 in the area A of the RAM 5. Here, when it is denied that it is determined that no data is recorded, the subsequent processing is skipped, and when it is affirmed, the process proceeds to S202.
[0057]
In S202, it is determined based on the failure determination information recorded in the B area of the RAM 5 whether or not the abnormality when the data existing in the A area of the RAM 5 is recorded is determined to be a failure. If the result is negative and it is determined that the abnormality corresponding to the recorded data has not been determined to be a failure, the process proceeds to S204, where the corresponding data recorded in any of the A areas of the RAM 5 is erased. .
[0058]
On the other hand, positive If it is determined that the corresponding abnormality is determined to be a failure, S204 is skipped and the data is held.
[0059]
As described above, in this embodiment, the data relating to the transient abnormality is always erased periodically and the data relating to the determined failure is retained, so that various data are stored in the predetermined recording area. Important data (particularly, data in a transition period) regarding the failure of the device can be efficiently recorded. Further, since the capacity of the RAM 5 can be reduced, the cost can be reduced.
[0060]
Further, at a predetermined time, that is, when the ignition switch is turned on, it is determined whether or not the abnormality is determined to be a failure, and when the failure is not determined, data relating to the abnormality is deleted. For example, before the predetermined point in time, the recorded data is kept irrespective of whether the abnormality is determined to be a failure or not. Cause analysis becomes possible.
[0061]
Further, since the data to be recorded in the RAM 5 is limited to the data from the abnormality detection time t1 to a predetermined time before (the data recording time T1), the abnormality which is important for analyzing the cause of the abnormality or the failure is detected. Only the data before the occurrence of the abnormality, including the transition period up to, can be efficiently recorded in the predetermined recording area.
[0062]
In other words, the trigger time for executing data recording is set to the abnormality detection time t1 instead of the failure confirmation time t2 (shown in FIG. 4) at which the abnormality is determined to be a failure. It is not necessary to record the data after the occurrence of the abnormality over the failure determination time T2 which is not so important for the cause analysis of the failure. For this reason, since it is possible to prevent the recording area of the RAM 5 from being wasted, it is possible to increase the number of samples in the data recording time T1, and to store data (especially data in a transition period) important for analyzing the cause of the abnormality or the failure. Recording can be performed efficiently.
[0063]
As described above, in the present embodiment, in the data recording device 1 that records data (such as an output signal of a sensor group and an internal calculation value) indicating the operating state of the device (transmission T), Abnormality detecting means (ECU2, S12) for detecting at least one of the abnormalities; and abnormality type determining means (ECU2, S18, S18, S100) Recording for judging whether or not the data is recorded in a predetermined data recording area (RAM5, specifically any one of A1, A2, and A3 of the A area) together with the determined type of abnormality. Content determining means (ECU2, S18, S102), and the data are stored in a predetermined data recording area together with the determined abnormality type. When it is determined not to be recorded in and constitute the data to include data recording means for recording the predetermined data recording area as well as the type of the discriminated abnormal (ECU2, S18, S104).
[0064]
Further, in the data recording device 1 for recording an output signal of a data sensor group indicating the operating state of the device (transmission T), an internal calculation value, and the like, an abnormality detecting unit (at least one of the device and the data) for detecting abnormality ECU2, S12), when at least one of the equipment and data is detected as abnormal, the data is sequentially stored in a predetermined data recording area (RAM5, specifically, any one of A1, A2, and A3 in area A). A data recording means (ECU2, S18, S100 to S104) for recording data in a predetermined condition (whether the detected abnormality continues over the failure determination time T2) Failure determination means (ECU2, S20, S2) for determining the abnormality as a failure of the device based on ), And at a predetermined time (when the ignition switch is turned on), it is determined whether or not the abnormality is determined to be the failure (ECU2, S202), and when the abnormality is not determined to be the failure And a data erasing means (ECU2, S204) for erasing the data recorded when an abnormality not determined as the failure is detected.
[0065]
Further, a time-series data storage means (ECU2, RAM5) for sampling the data at a predetermined cycle and storing the data as time-series data is provided, and the data recording means detects at least any abnormality of the device and the data. The time series data is recorded from a point in time (abnormality detection point in time t1) to a predetermined time before (data recording time T1).
[0066]
Further, in the above description, the data recording device 1 has been described by taking the control device of the automatic transmission (transmission T) as an example, but the present invention is also applicable to other control devices.
[0067]
Further, the area A of the RAM 5 is divided into three areas A1, A2 and A3, but may be divided into two or four or more. Further, the data to be recorded thereon is not limited to the above.
[0068]
Further, the data is recorded by prohibiting the updating of the data in the RAM 5. However, in addition to the RAM 5, a RAM for storing the data which can be updated at any time is provided. Data stored in the RAM may be recorded in the RAM 5.
[0069]
Although the sampled data is stored in the RAM 5 while being thinned out at predetermined intervals, the thinning interval may be variable as described above. For example, the number of thinnings is reduced as the abnormality detection time t1 is approached. By increasing the number of thinnings as the distance from the time point t1 increases, the information of the transition period can be more clearly recorded.
[0070]
Further, the failure is determined based on whether the abnormality has continued for the failure determination time T2. However, the failure may be determined based on the degree of the abnormality, that is, how far away from the normal value.
[0071]
Further, when the abnormality is determined to be a failure, the data relating to the failure is kept stored. However, when the cause of the failure is improved by repairing the device, the data may be deleted by an appropriate method. Needless to say.
[0072]
【The invention's effect】
In claim 1, Mounted on the vehicle An abnormality of the data indicating the operation state of the device is detected, and when the abnormality of the data is detected, the type of the abnormality is determined, and the data is stored in a predetermined data recording area together with the determined type of the abnormality. It is determined whether or not the data is recorded, and when it is determined that the data is not yet recorded in the predetermined data recording area together with the type of the determined abnormality, the data is stored together with the type of the determined abnormality. Since it is configured to be recorded in a predetermined data recording area, it is possible to prevent similar data relating to an event that may occur repeatedly such as a transient abnormality from being recorded a plurality of times. Important data relating to various abnormalities and failures can be recorded efficiently. In other words, the capacity of the recording area can be reduced, and the effect of suppressing costs can be expected.
[0073]
Also, When data abnormality is detected continuously for the failure confirmation time, Determining the abnormality as a failure of the device; When the ignition switch of the vehicle is turned on It is determined whether or not the abnormality is determined to be the failure, and when the abnormality is not determined to be the failure, the data recorded when the abnormality that is not determined to be the failure is detected is deleted. With such a configuration, important data relating to various failures can be efficiently recorded in a predetermined recording area. In other words, the capacity of the recording area can be reduced, and the effect of suppressing costs can be expected.
[0074]
Further, at a predetermined time, it is determined whether or not the abnormality is determined to be a failure, and when the failure is not determined, the data corresponding to the abnormality is erased. In other words, since the recorded data remains regardless of whether the abnormality is determined to be a failure, the cause analysis can be performed for an abnormality that has not been determined to be a failure.
[0075]
Claim 2 In the section, the data is sampled at a predetermined cycle and stored as time-series data, Note ー Of Since the time-series data is recorded from the time when the abnormality is detected until a predetermined time before, the data important for the cause analysis of the abnormality or the failure, particularly the data in the transition period, can be efficiently stored in the predetermined recording area. Can be recorded.

[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a data recording device according to an embodiment of the present invention.
FIG. 2 is a schematic diagram showing an outline of an automatic transmission (transmission) in which data is recorded by the apparatus shown in FIG. 1;
FIG. 3 is a flow chart showing data recording and failure determination as operations of the apparatus in FIG. 1;
FIG. 4 is a time chart for explaining the processing of the flow chart of FIG. 3;
FIG. 5 is a subroutine flowchart showing a specific process of recording data in the flowchart of FIG. 3;
FIG. 6 is an explanatory diagram for explaining a configuration of a RAM in the apparatus of FIG. 1;
FIG. 7 is a table showing data recorded by the apparatus in FIG. 1;
FIG. 8 is a flowchart showing another operation of the apparatus of FIG. 1, which is data erasure.
[Explanation of symbols]
1 Data recording device
2 ECU (electronic control unit)
3 CPU
4 ROM
5 RAM
6 Input circuit
7 A / D converter
T automatic transmission (transmission)

Claims (2)

A data recording device that records data indicating an operation state of a device mounted on a vehicle ,
a. Abnormality detection means for detecting an abnormality in the data,
b. When an abnormality of the data is detected, an abnormality type determining unit that determines a type of the abnormality,
c. Recording content determining means for determining whether the data is recorded in a predetermined data recording area together with the type of the determined abnormality,
And d. When it is determined that the data is not recorded in the predetermined data recording area together with the determined abnormality type, the data recording that records the data in the predetermined data recording area together with the determined abnormality type. means,
In a data recording device provided with
e. When the abnormality of the data is continuously detected over the failure determination time, a failure determination unit that determines the abnormality as a failure of the device,
And f. When the ignition switch of the vehicle is turned on, it is determined whether or not the abnormality is determined to be the failure.When the abnormality is not determined to be the failure, the abnormality that is not determined to be the failure is detected. Data erasing means for erasing the data recorded when the
A data recording device comprising: further,
g. A time-series data storage unit that samples the data at a predetermined cycle and stores the data as time-series data;
2. The data recording apparatus according to claim 1, wherein the data recording unit records the time-series data from a time point at which the abnormality of the data is detected until a predetermined time before.

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